73 steering box

[justcruisin]

Can anyone tell me the difference between a 71 and a 73 power steer box, I know the sector shaft is larger on the 73 but is that it or will I have other issues fitting the later box to my 71?

[SAC]

I just had a conversation with Dick Ross at Firm Feel about this on Thursday.  I ordered a Stage II box for my '72, and they are planning to send me a '73-up box since that's all they had lying around.  He said the external casting is the same.  Only difference is the sector shaft, which necessitates a new pitman arm.

[justcruisin]

OK thanks, seems the 73 and up is more available.

[Nacho-RT74]

73 and lates have a Keyed splines pattern on pitman shaft ( 4 keys )